Overview

OCP/Telco Definition of Done
Epic Template descriptions and documentation.

Goal

• Looking at the CoreDNS forward plugin documentation [1], it looks like by default, the forward behavior will load balance at random across the healthy DNS servers. There are options to also use round-robin or sequential load balancing across the different upstreams by using the `policy` option.
• Reading through the RedHat reference doc for the DNS operator object [2], there does not seem to be an option to set this CoreDNS forward policy configuration. The customer would like the ability to set this configuration via the DNS operator because the customer would like to prefer the closest DNS servers while having additional servers configured for failover.
• [1] https://coredns.io/plugins/forward/
  [2] https://docs.openshift.com/container-platform/4.8/rest_api/operator_apis/dns-operator-openshift-io-v1.html

Notes

• Medium effort due to API change

RFE

• https://issues.redhat.com/browse/RFE-1263